-35.86% is the change from 251 to 161
Calculation steps:
[( 161 - 251 ) ÷ 251] x 100 = -35.86%
Formula
Percentage change = [(161 - 251) / 251] x 100
Subtract the new number by the original number
161 - 251 = -90
-90 ÷ 251 = -0.35856573705179284
-0.35856573705179284 x 100 = -35.86%